Replace Main Bearing without Removing Crank
#2658072
05/22/19 04:36 PM
05/22/19 04:36 PM
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Joined: Jan 2003
Posts: 4,276 Danville, NH
Mopar_Mike
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,276
Danville, NH
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Can the main crank bearings be removed/replaced without removing the crankshaft on a 426 Hemi? Thanks.
RS23L7 4-Speed
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Re: Replace Main Bearing without Removing Crank
[Re: Mopar_Mike]
#2658086
05/22/19 05:06 PM
05/22/19 05:06 PM
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Joined: Dec 2004
Posts: 10,549 Rittman Ohio
fourgearsavoy
I Live Here
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I Live Here
Joined: Dec 2004
Posts: 10,549
Rittman Ohio
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I have done it on daily driver cars before but there is usually some crank damage if the bearings failed though. Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: Replace Main Bearing without Removing Crank
[Re: plycuda]
#2658092
05/22/19 05:16 PM
05/22/19 05:16 PM
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Joined: Jan 2003
Posts: 4,276 Danville, NH
Mopar_Mike
OP
master
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OP
master
Joined: Jan 2003
Posts: 4,276
Danville, NH
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Thanks, have a hemi I want to use at the drags. No damage or problems, but I want to put fresh bearings in if I can without taking it all apart.
RS23L7 4-Speed
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Re: Replace Main Bearing without Removing Crank
[Re: dvw]
#2658242
05/22/19 10:57 PM
05/22/19 10:57 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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I've done it plenty of times. Never had an issue. Loosen all 5 bearings first and take your time. The thrust is the toughest.Though I've never tried the cotter pin trick. Doug I use a thin blade screw driver on the upper bearing half that doesn't have the retaining tab and push it so it will slide out the other side of the main webbing. You can also try and use the thin blade between the block and the back of the bearing retaining tab to pry the bearing retaining tab down out of the block Be careful on installing the new half, make sure it is absolutely brain surgery clean on the back side of the bearing, maybe get a can of spray brake cleaner and try to clean the top half of the main webbing out also, use plenty of compress air to blow any tiny pieces out and dry the break cleaner off the main webbing Make sure and oil the crank bearing surface as well as maybe spread a little oil on the bottom half also IHTHs
Last edited by Cab_Burge; 05/22/19 11:01 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Replace Main Bearing without Removing Crank
[Re: plycuda]
#2658279
05/23/19 03:36 AM
05/23/19 03:36 AM
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Joined: Jan 2003
Posts: 9,963 Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,963
Frostbitefalls MN (Rocky&Bullw...
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I used a piece of aluminum a little narrower and thinner than the bearing shell. Use it like a drift, gently tap against the bearing shell and once it breaks loose, about 1/4 inch, it will slide right around.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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